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<title>左视图实验报告（教师版，含答案）</title>
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  <h1>三视图练习 — 左视图（教师版）</h1>
  <p class="small">说明：右侧为实体轴测示意图（示意），下方表格列出从源文件提取并经左视图可见判定的点及其三维坐标（单位：毫米）。此文档可直接打印为 PDF 分发给教师或存档。</p>

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    <h3>实体示意图（轴测）</h3>
    <img class="diagram" src="123_extracted/thumbnails/Thumbnail.png" alt="diagram">
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  <h3>左视图可见点坐标（答案）</h3>
  <table>
    <thead><tr><th>序号</th><th>点名</th><th>X</th><th>Y</th><th>Z</th><th>Left view (水平=-Y, 垂直=Z)</th></tr></thead>
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      <tr><td>1</td><td>A</td><td>25.000</td><td>60.000</td><td>0.000</td><td>(-60.000, 0.000)</td></tr>
      <tr><td>2</td><td>K</td><td>-30.000</td><td>15.000</td><td>0.000</td><td>(-15.000, 0.000)</td></tr>
      <tr><td>3</td><td>I</td><td>30.000</td><td>-15.000</td><td>0.000</td><td>(15.000, 0.000)</td></tr>
      <tr><td>4</td><td>J</td><td>30.000</td><td>-25.000</td><td>0.000</td><td>(25.000, 0.000)</td></tr>
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  <p class="small">文件位置：d:\FreeCad\FreeCadTest\FCStd</p>
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